<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    var count=0;
    for(i=1;i<=100;i++){
        var a=0;
        for(j=1;j<=i;j++){
            if(i%j==0){
                a++
            }
        }
        if(a==2){
            count++;
        }
    }
    alert(count)
</script>